CN113607125B - Monitoring system for monitoring tension of inverted vertical line and using method - Google Patents
Monitoring system for monitoring tension of inverted vertical line and using method Download PDFInfo
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- CN113607125B CN113607125B CN202110892997.6A CN202110892997A CN113607125B CN 113607125 B CN113607125 B CN 113607125B CN 202110892997 A CN202110892997 A CN 202110892997A CN 113607125 B CN113607125 B CN 113607125B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Abstract
The invention relates to a monitoring system for monitoring tension of an inverted vertical line and a using method thereof; the system comprises a monitoring device, a measuring point assembly and an inverted vertical line anchoring assembly; the monitoring device comprises a pontoon, a floater, a tension line, floating liquid and a pressure sensor; the pontoon is arranged as a cylindrical barrel, and the top of the pontoon is provided with a top cover; the float is arranged as a hollow sealing cavity; a fixed block is arranged in the pontoon, and a first fixed pulley is arranged on the fixed block; the upper part of the floater is provided with a second fixed pulley; one end of the tension line is fixedly connected with the top of the floater, and the tension line is sequentially and respectively connected with the inverted vertical line by bypassing the second fixed pulley and the first fixed pulley. The invention can realize the real-time monitoring of the tension of the inverted vertical line, and not only is accurate and reliable in monitoring, but also is simple and convenient in use; the monitoring device is used for directly monitoring and calculating the tension of the inverted vertical line, so that the problem that the tension of the inverted vertical line cannot be obtained by real-time monitoring and calculating is solved.
Description
Technical Field
The invention belongs to the technical field of deep deformation monitoring of a water conservancy and hydropower dam foundation, and particularly relates to a system for monitoring tension of an inverted vertical measuring line and a use method thereof.
Background
The inverted vertical device is one of important means for monitoring deep deformation of a water conservancy and hydropower dam foundation, and daily maintenance of a floating body assembly is required. According to the operation and maintenance regulations of a dam safety monitoring system (DLT 1558-2016), whether the oil in the inverted floating pontoon is sufficient or not is checked for 1 time/month, and whether the inverted floating force can meet the tension requirement of a measuring line or not is checked. However, in daily work, the floating body component of the inverted vertical device is approximately 2m high, and meanwhile, in order to avoid invasion of foreign matters and corrosion in a humid environment, a stainless steel structure is often sealed, so that the maintenance work of inspection personnel is very inconvenient. In addition, most of the inverted vertical devices realize automatic monitoring, the frequency is 1 time/day, and the frequency of manual operation and maintenance cannot be matched with the actual requirements. Therefore, it is necessary to study the device and method for monitoring the tension of the inverted vertical line so as to meet the requirement of real-time monitoring of the tension of the inverted vertical line.
Disclosure of Invention
The present invention is directed to solving the above-mentioned drawbacks and providing a monitoring system for monitoring the tension of a sagged line and a method for using the same.
The invention is realized by adopting the following technical scheme.
The invention relates to a monitoring system for monitoring the tension of an inverted vertical line, which comprises a monitoring device; the monitoring device comprises a pontoon 1, a floater 2, a tension line 7, a floating liquid 3 and a pressure sensor 4;
the pontoon 1 is arranged as a cylindrical barrel, and the top of the pontoon is provided with a top cover;
the float 2 is arranged as a hollow sealing cavity;
a fixed block 8 is arranged in the pontoon 1, and a first fixed pulley 9.1 is arranged on the fixed block 8; the upper part of the floater 2 is provided with a second fixed pulley 9.2;
one end of the tension line 7 is fixedly connected with the top of the floater 2, and sequentially bypasses the second fixed pulley 9.2 and the first fixed pulley 9.1 to be connected with the inverted vertical line 11;
the floating liquid 3 is arranged in the floating drum 1, and the floating drum 2 is floatingly arranged on the floating liquid 3;
the pressure sensor 4 is fixedly arranged on the side wall of the floater 2 and is kept below the liquid level of the floating liquid 3;
the pressure sensor 4 is connected with a reading instrument through a sensor cable, and the reading instrument is arranged outside the pontoon 1.
Furthermore, the pontoon 1, the pontoon 2, the tension line 7 and the pressure sensor 4 are symmetrically arranged; the device comprises a first buoy 1.1, a first buoy 2.1, a first tension line 7.1, a first pressure sensor 4.1, a second buoy 1.2, a second buoy 2.2, a second tension line 7.2 and a second pressure sensor 4.2;
the upper part of the first floater 2.1 is provided with a second fixed pulley 9.2, one end of a first tension line 7.1 is fixedly connected with the top of the first floater 2.1, and the first fixed pulley 9.1 and the second fixed pulley 9.2 are respectively wound around in sequence and connected with an inverted vertical line 11;
the upper part of the second floater 2.2 is provided with a third fixed pulley 9.3, one end of the second tension line 7.2 is fixedly connected with the top of the second floater 2.2, and the second tension line is sequentially and respectively connected with the inverted vertical line 11 by bypassing the third fixed pulley 9.3 and the first fixed pulley 9.1;
the first tension line 7.1 and the second tension line 7.2 are arranged in a bundle and then connected with the inverted vertical line 11.
Further, a cavity 10 is arranged between the first pontoon 1.1 and the second pontoon 1.2, and the fixing block 8 is arranged at the upper part of the cavity 10; the tension lines 7 extend outside the pontoon 1 through the hollow body 10.
Further, the pressure sensor 4 of the present invention is fixedly disposed at the middle or bottom sidewall of the float 2.
Further, the fixed block 8 of the present invention is disposed above the surface of the floating liquid 3.
Further, the second fixed pulley 9.2 and the third fixed pulley 9.3 according to the present invention are disposed above the surface of the floating liquid 3.
Furthermore, the pontoon 1 is a stainless steel pontoon; the floater 2 is a stainless steel floater; the tension line is a steel wire; the floating liquid 3 is engine oil or vertical line floating oil.
Further, the invention also comprises a measuring point assembly 5 and an inverted vertical line anchoring assembly 6; a straight hole 12 is vertically arranged in the dam foundation, and the inverted vertical line anchoring assembly 6 is arranged at the bottom of the straight hole 12;
the measuring point assembly 5 is arranged at the upper part of the dam foundation;
the inverted vertical line 11 is sequentially connected with the monitoring device, the measuring point assembly 5 and the inverted vertical line anchoring assembly 6 from top to bottom.
A method of using the above system, the method comprising the steps of:
step 1: drilling holes vertically in the dam foundation, burying an inverted vertical line anchoring assembly 6 and a erection measuring point assembly 5, and arranging a monitoring device above the inverted vertical line anchoring assembly and the erection measuring point assembly;
step 2: detecting whether the reading of the pressure sensor 4 is normal or not by using a secondary instrument, and installing a floating body component after the detection is qualified;
step 3: the reading instrument is used for collecting the reading of the pressure sensor 4, and then the pulling force of the corresponding falling measuring line is calculated.
The tension calculation method of the inverted vertical line in the step 3 comprises the following steps:
step 1: the reading instrument is used for collecting the reading of the pressure sensor of the floater, and the depth of the floating oil in the floater is calculated according to the instrument specificationHThe 3 volume V of float immersed in the float is calculated using formula (I):
wherein; d, obtaining the inner diameter of the outer ring of the floater according to actual conditions; d, obtaining the outer diameter of the inner ring of the floater according to actual conditions; h-the height of the float immersed in the float 3;
step 2: calculating the backdrop line tension P by using a formula (II):
wherein: g, weight of the floater;
-the float volume weight, based on the material properties; g-9.8N/kg.
The invention has the beneficial effects that the invention can realize the real-time monitoring of the tension of the inverted vertical line, and the monitoring is accurate and reliable, and the use is simple and convenient; the monitoring device is used for directly monitoring and calculating the tension of the inverted vertical line, so that the problem that the tension of the inverted vertical line cannot be obtained by real-time monitoring and calculating is solved.
The invention is further explained below in connection with specific embodiments.
Drawings
Fig. 1 is a schematic view of the structure of the present invention when installed and used.
Fig. 2 is a schematic structural diagram of the monitoring device of the present invention.
FIG. 3 is a graph of the change in the backdrop line tension over time in an embodiment of the present invention.
In the figure, the reference numerals are a buoy (1), a first buoy (1.1), a second buoy (1.2), a buoy (2), a first buoy (2.1), a second buoy (2.2), a floating liquid (3), a pressure sensor (4), a first pressure sensor (4.1), a second pressure sensor (4.2), a measuring point assembly (5), a plumb line anchoring assembly (6), a tension line (7), a first tension line (7.1), a second tension line (7.2), a fixed block (8), a first fixed pulley (9.1), a second fixed pulley (9.2), a third fixed pulley (9.3), a cavity (10), a plumb line (11) and a straight hole (12).
Detailed Description
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
Examples
The project is an equal-sized (1) project, and the permanent main hydraulic building is a 1-level building. The pivot arrangement adopts an overlapped arrangement scheme of concrete gravity dams, first-stage dam rear type plants, second-stage underground plants and large differential ram flow energy dissipation before the plants. Wherein the barrage is a concrete entity gravity dam. The dam axis is straight line and goes to NE74 degrees 55'32.89, and the dam crest length is 418m, and 19 dam segments are divided. And arranging a sagging device in the 7# basic gallery observation room for basic horizontal displacement monitoring, wherein the measuring point number is IP3, the length of a fiber body is 56.6m, and the weight, the outer diameter and the inner diameter of the floater are respectively 8kg, 500mm and 220mm.
Referring to fig. 1 and 2, a monitoring system for monitoring the tension of a backdrop line according to the present invention includes a monitoring device; the monitoring device comprises a pontoon 1, a floater 2, a tension line 7, a floating liquid 3 and a pressure sensor 4;
the pontoon 1 is arranged as a cylindrical barrel, and the top of the pontoon is provided with a top cover;
the float 2 is arranged as a hollow sealing cavity;
a fixed block 8 is arranged in the pontoon 1, and a first fixed pulley 9.1 is arranged on the fixed block 8; the upper part of the floater 2 is provided with a second fixed pulley 9.2;
one end of the tension line 7 is fixedly connected with the top of the floater 2, and sequentially bypasses the second fixed pulley 9.2 and the first fixed pulley 9.1 to be connected with the inverted vertical line 11;
the floating liquid 3 is arranged in the floating drum 1, and the floating drum 2 is floatingly arranged on the floating liquid 3;
the pressure sensor 4 is fixedly arranged on the side wall of the floater 2 and is kept below the liquid level of the floating liquid 3;
the pressure sensor 4 is connected with a reading instrument through a sensor cable, and the reading instrument is arranged outside the pontoon 1; the depth of the float immersed in the floating liquid can be monitored in real time.
Furthermore, the pontoon 1, the pontoon 2, the tension line 7 and the pressure sensor 4 are symmetrically arranged; the device comprises a first buoy 1.1, a first buoy 2.1, a first tension line 7.1, a first pressure sensor 4.1, a second buoy 1.2, a second buoy 2.2, a second tension line 7.2 and a second pressure sensor 4.2;
the upper part of the first floater 2.1 is provided with a second fixed pulley 9.2, one end of a first tension line 7.1 is fixedly connected with the top of the first floater 2.1, and the first fixed pulley 9.1 and the second fixed pulley 9.2 are respectively wound around in sequence and connected with an inverted vertical line 11;
the upper part of the second floater 2.2 is provided with a third fixed pulley 9.3, one end of the second tension line 7.2 is fixedly connected with the top of the second floater 2.2, and the second tension line is sequentially and respectively connected with the inverted vertical line 11 by bypassing the third fixed pulley 9.3 and the first fixed pulley 9.1;
the first tension line 7.1 and the second tension line 7.2 are arranged in a bundle and then connected with the inverted vertical line 11.
Further, a cavity 10 is arranged between the first pontoon 1.1 and the second pontoon 1.2, and the fixing block 8 is arranged at the upper part of the cavity 10; the tension lines 7 extend outside the pontoon 1 through the hollow body 10.
Further, the pressure sensor 4 of the present invention is fixedly disposed at the middle or bottom sidewall of the float 2.
Further, the fixed block 8 of the present invention is disposed above the surface of the floating liquid 3.
Further, the second fixed pulley 9.2 and the third fixed pulley 9.3 according to the present invention are disposed above the surface of the floating liquid 3.
Furthermore, the pontoon 1 is a stainless steel pontoon; the floater 2 is a stainless steel floater; the tension line is a steel wire; the floating liquid 3 is engine oil or vertical line floating oil.
Further, the invention also comprises a measuring point assembly 5 and an inverted vertical line anchoring assembly 6; a straight hole 12 is vertically arranged in the dam foundation, and the inverted vertical line anchoring assembly 6 is arranged at the bottom of the straight hole 12;
the measuring point assembly 5 is arranged at the upper part of the dam foundation;
the inverted vertical line 11 is sequentially connected with the monitoring device, the measuring point assembly 5 and the inverted vertical line anchoring assembly 6 from top to bottom.
A method of using the above system, the method comprising the steps of:
step 1: drilling holes vertically in the dam foundation, burying an inverted vertical line anchoring assembly 6 and a erection measuring point assembly 5, and arranging a monitoring device above the inverted vertical line anchoring assembly and the erection measuring point assembly;
step 2: detecting whether the reading of the pressure sensor 4 is normal or not by using a secondary instrument, and installing a floating body component after the detection is qualified;
step 3: the reading instrument is used for collecting the reading of the pressure sensor 4, and then the pulling force of the corresponding falling measuring line is calculated.
The tension calculation method of the inverted vertical line in the step 3 comprises the following steps:
step 1: the reading instrument is used for collecting the reading of the pressure sensor of the floater, and the depth of the floating oil in the floater is calculated according to the instrument specificationHThe 3 volume V of float immersed in the float is calculated using formula (I):
wherein; d, obtaining the inner diameter of the outer ring of the floater according to actual conditions; d, obtaining the outer diameter of the inner ring of the floater according to actual conditions; h-the height of the float immersed in the float 3;
step 2: calculating the backdrop line tension P by using a formula (II):
wherein: g, weight of the floater;
-the float volume weight, based on the material properties; g-9.8N/kg.
The instrument obtains the initial value from 20 days 1 month 2020, and at present the instrument behavior is normal, and the float oil depth above the float of reading through data acquisition instrumentHAccording to the field condition, the volume V of the float immersed in the floating liquid can be calculated by using the formula (I), the pulling force P of the inverted sagging measuring line can be calculated to be 417.37N by using the formula (II), the pulling force P is larger than the required buoyancy 391.5N, and the pulling force of the measuring line can meet the requirement of the inverted sagging buoyancy. The backdrop line tension-time course line is shown in fig. 3.
The pulling force is greater than or equal to 250 (1+0.01 x L) N, L is the length of the wire body, and m. The device needs to monitor whether the pulling force meets the requirement in a fixed period or real time.
The foregoing is only a few specific embodiments of the present invention (since the embodiments of the present invention are not intended to be exhaustive, the scope of the invention is defined by the description of the invention and other technical gist of the invention), and the details or common sense of the prior art are not described in any detail herein. It should be noted that the above embodiments do not limit the present invention in any way, and it is within the scope of the present invention for those skilled in the art to obtain the technical solution by equivalent substitution or equivalent transformation. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. A monitoring method for monitoring the tension of a backdrop line, which is characterized by comprising a monitoring device; the monitoring device comprises a pontoon (1), a floater (2), a tension line (7), a floating liquid (3), a pressure sensor (4), a measuring point assembly (5) and an inverted vertical line anchoring assembly (6);
the pontoon (1) is arranged as a cylindrical barrel, and the top of the pontoon is provided with a top cover;
the float (2) is arranged as a hollow sealing cavity;
a fixed block (8) is arranged in the pontoon (1), and a first fixed pulley (9.1) is arranged on the fixed block (8); the upper part of the floater (2) is provided with a second fixed pulley (9.2);
one end of the tension line (7) is fixedly connected with the top of the floater (2), and sequentially bypasses the second fixed pulley (9.2) and the first fixed pulley (9.1) to be connected with the inverted vertical line (11);
the floating liquid (3) is arranged in the floating drum (1), and the floating drum (2) floats on the floating liquid (3);
the pressure sensor (4) is fixedly arranged on the side wall of the floater (2) and is kept below the liquid level of the floating liquid (3);
the pressure sensor (4) is connected with a reading instrument through a sensor cable, and the reading instrument is arranged outside the pontoon (1);
a straight hole (12) is vertically arranged in the dam foundation, and the inverted vertical line anchoring assembly (6) is arranged at the inner bottom of the straight hole (12);
the measuring point assembly (5) is arranged at the upper part of the dam foundation;
the inverted vertical line (11) is sequentially connected with the monitoring device, the measuring point assembly (5) and the inverted vertical line anchoring assembly (6) from top to bottom;
the method comprises the following steps:
step 1: drilling holes vertically in the dam foundation, burying an inverted vertical line anchoring assembly (6) and a erection measuring point assembly (5), and arranging a monitoring device above the inverted vertical line anchoring assembly;
step 2: detecting whether the reading of the pressure sensor (4) is normal or not by using a secondary instrument, and installing a floating body component after the detection is qualified;
step 3: collecting the reading of the pressure sensor (4) by using a reading instrument, and then calculating the pulling force of the corresponding inverted vertical line;
the pressure sensor reading of the floater is acquired by a reading instrument, and the immersed floating liquid volume V of the floater is calculated by a formula (I):
wherein; d, obtaining the inner diameter of the outer ring of the floater according to actual conditions; d, obtaining the outer diameter of the inner ring of the floater according to actual conditions; h—the height of the float immersed in the float;
step 2: calculating the backdrop line tension P by using a formula (II):
wherein: g, weight of the floater;
-the float volume weight, based on the material properties; g-9.8N/kg.
2. The monitoring method for monitoring the pulling force of the inverted vertical line according to claim 1, wherein the number of the pontoon (1), the floater (2), the pulling line (7) and the pressure sensor (4) is two, and the pontoon, the floater, the pulling line and the pressure sensor are symmetrically arranged; comprises a first buoy (1.1), a first buoy (2.1), a first tension line (7.1), a first pressure sensor (4.1) and a second buoy (1.2), a second buoy (2.2), a second tension line (7.2) and a second pressure sensor (4.2);
the upper part of the first floater (2.1) is provided with a second fixed pulley (9.2), one end of the first tension line (7.1) is fixedly connected with the top of the first floater (2.1), and the second fixed pulley (9.2) and the first fixed pulley (9.1) are respectively wound around in sequence and connected with the inverted vertical line (11);
a third fixed pulley (9.3) is arranged at the upper part of the second floater (2.2), one end of the second tension line (7.2) is fixedly connected with the top of the second floater (2.2), and the third fixed pulley (9.3) and the first fixed pulley (9.1) are respectively and sequentially wound around and connected with the inverted vertical line (11);
the first tension line (7.1) and the second tension line (7.2) are arranged in a bundle and then connected with the inverted vertical line (11).
3. The monitoring method for monitoring the pulling force of the inverted vertical line according to claim 2, wherein a cavity (10) is arranged between the first pontoon (1.1) and the second pontoon (1.2), and the fixing block (8) is arranged at the upper part of the cavity (10); the tension wire (7) passes through the cavity (10) and extends out of the pontoon (1).
4. The method for monitoring the tension of the inverted vertical line according to claim 1, wherein the pressure sensor (4) is fixedly arranged on the middle or bottom side wall of the float (2).
5. The method for monitoring the tension of the inverted vertical line according to claim 1, wherein the fixed block (8) is arranged above the liquid surface of the floating liquid (3).
6. The method for monitoring the tension of the inverted vertical line according to claim 1, wherein the second fixed pulley (9.2) and the third fixed pulley (9.3) are arranged above the liquid surface of the floating liquid (3).
7. The method for monitoring the pulling force of a backdrop line according to claim 1, wherein the pontoon (1) is a stainless steel pontoon; the floater (2) is a stainless steel floater; the tension line is a steel wire; the floating liquid (3) is engine oil or vertical line floating oil.
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